RFR: 8248268: Support KWP in addition to KW [v9]

[Valerie Peng]

On Sun, 30 May 2021 07:25:54 GMT, Valerie Peng <valeriep at openjdk.org> wrote:

>> This change updates SunJCE provider as below:
>> - updated existing AESWrap support with AES/KW/NoPadding cipher transformation. 
>> - added support for AES/KWP/NoPadding and AES/KW/PKCS5Padding.
>> 
>> Existing AESWrap impl, i.e. AESWrapCipher class, is re-factored and renamed to KeyWrapCipher class. The W and W_inverse functions are moved to KWUtil class. The KW and KWP support are in the new AESKeyWrap and AESKeyWrapPadded classes which extend FeedbackCipher and used in KeyWrapCipher class. To minimize data copying, AESKeyWrap and AESKeyWrapPadded will do the crypto operation over the same input buffer which is allocated and managed by KeyWrapCipher class. 
>> 
>> Also note that existing AESWrap impl does not take IV. However, the corresponding PKCS#11 mechanisms do, so I added support for accepting IVs to both KW and KWP.
>> 
>> Thanks,
>> Valerie
>
> Valerie Peng has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Update to address review feedbacks and minor optimizations.

In the latest commit, I have made some minor optimizations regrading the in-place encryption as suggested in Mike's earlier comments. However, the optimizations are limited to when the output offset == 0 case.

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PR: https://git.openjdk.java.net/jdk/pull/2404